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Validating parameters to a Bash script
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#!/bin/sh
die () {
echo >&2 "$@"
exit 1
}
[ "$#" -eq 1 ] || die "1 argument required, $# provided"
echo $1 | grep -E -q '^[0-9]+$' || die "Numeric argument required, $1 provided"
while read dir
do
[ -d "$dir" ] || die "Directory $dir does n...
Convert Base64 string to an image file? [duplicate]
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265
The problem is that data:image/png;base64, is included in the encoded contents. This will resu...
git update-index --assume-unchanged on directory
git 1.7.12
4 Answers
4
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Aligning a float:left div to center?
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218
use display:inline-block; instead of float
you can't centre floats, but inline-blocks centre ...
What does “abstract over” mean?
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124
In algebra, as in everyday concept formation, abstractions are formed by grouping things by som...
C++ code file extension? .cc vs .cpp [closed]
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community wiki
2 revs, 2 users 67%JaredPar
101
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Best way to test if a generic type is a string? (C#)
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162
Keep in mind that default(string) is null, not string.Empty. You may want a special case in your...
How to identify numpy types in python?
...ut where it was defined:
>>> import numpy as np
a = np.array([1, 2, 3])
>>> type(a)
<type 'numpy.ndarray'>
>>> type(a).__module__
'numpy'
>>> type(a).__module__ == np.__name__
True
...
How to check for null in Twig?
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522
Depending on what exactly you need:
is null checks whether the value is null:
{% if var is n...